Merge pull request #1 from phirSOFT/TargetContextProvider

Implement TargetObjectContextProvider

phirSOFT.ContextProperties/TargetObjectContextProvider.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace phirSOFT.ContextProperties
+{
+    /// <summary>
+    /// Implements a <see cref="IContextProvider{TProperty,TValue}"/> that redirects the calls to the target object if possible.
+    /// </summary>
+    /// <typeparam name="TProperty">THe type of the property.</typeparam>
+    /// <typeparam name="TValue">The type of the value.</typeparam>
+    public class TargetObjectContextProvider<TProperty, TValue> : IContextProvider<TProperty, TValue> where TProperty : IContextProperty<TValue>
+    {
+        /// <inheritdoc cref="IContextProvider{TProperty,TValue}.GetValue"/>
+        public TValue GetValue(object targetObject, TProperty targetProperty)
+        {
+            return ((IContextProvider<TProperty, TValue>) targetObject).GetValue(targetObject, targetProperty);
+        }
+
+        /// <inheritdoc cref="IContextProvider{TProperty,TValue}.OverridesValue"/>
+        public bool OverridesValue(object targetObject, TProperty targetProperty)
+        {
+            return targetObject is IContextProvider<TProperty, TValue> provider &&
+                   provider.OverridesValue(targetObject, targetProperty);
+        }
+    }
+}